MODELLING A GLASS By Olivier Saraja

Toggle into top view (NUM-7) and make sure the cursor is at the right place. Also make sure you are in Edit mode (TAB) and that all the vertices are selected (A-KEY).

Display the Edit Buttons (F9-KEY) and set these parameters to these values : Degr: 360, Steps: 36 then press the Spin button.

You should get the following result.

Leave the Edit mode (TAB) and toggle to side or face view (NUM-3 or NUM-1) to have a more striking point of view of your object.
 
 

You just have to click on the 'Set Smooth' button to obtain a soft surface and get rid of the faces of your object during rendering or shaded view (Z-KEY).